thousands of people marched in washington on saturday in support of new gun control laws. this comes just days after a bill was introduced in congress that would ban assault rifles, semi-automatic weapons, and high-capacity magazines. some marchers carried signs featuring the names of victims in last month's newtown, connecticut shooting. >>> it's already claimed three lives. now this arctic air system is wreaking havoc as it moves east. snow, freezing rain, and dangerous amounts of ice causing scenes like this one in virginia, on roads across the country. this is kentucky. icy roads blamed for this ten-vehicle pileup. a greyhound bus also sliding off the slick interstate. >>> now to egypt, where roitding has erupted over a court decision sentencing 21 people to death. at least 30 people were killed in clashes with security forces today. this all happened after the court sentenced the 21 people for their role in a post-game soccer riot last year. more than 70 people were killed in that riot. those are your headlines this hour. i'm don lemon. keeping you informed, cnn, the